Bodrum Castle, also known as Bodrum Kalesi, is a historic fortress located in the port city of Bodrum, Turkey. Built by the Knights of St John in the 15th century, this castle has four towers named after different European nations. Over the years, it served various purposes, from being a refuge for Christians to a prison. Today, it houses the Bodrum Museum of Underwater Archaeology, showcasing ancient shipwreck discoveries and artifacts. The castle offers a fascinating glimpse into history and provides stunning views of the city and surrounding bays.